I edited a question and among other things I changed corn to cron. Another user also edited the question at about the same time. I thought my edit was better, so I rolled back to my edit, but instead of cron, it still says corn.

My edit:

Question after rollback:

As you can see, the result of the rollback is completely different from my edit. My edit was useless, because there is no way to get it back. This is quite frustrating.

Not sure if this is relevant, but I was improving a suggested edit and then did a rollback.

Since both of you have the same goal of improving the post, it probably would have been easier to just submit a second edit and adjust the things that the other editor missed rather than rolling back all changes. Still, this does seem a bit buggy...
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jmort253Jul 28 '12 at 7:33